Question

Number of amine compounds from the following giving solids which are soluble in NaOH upon reaction with Hinsberg's reagent is _____.

Answer 1

Correct Answer: 5

To determine the quantity of amine compounds yielding NaOH-soluble solids upon reaction with Hinsberg's reagent, execute the subsequent procedures:

1. Comprehend Hinsberg's Test: This test serves to distinguish between primary, secondary, and tertiary amines.
   • Primary amines undergo reaction with Hinsberg's reagent, producing a sulfonamide that exhibits solubility in alkaline solutions like NaOH.
   • Secondary amines yield a sulfonamide that is typically insoluble in NaOH.
   • Tertiary amines do not participate in a reaction with Hinsberg's reagent.
2. Classify Amine Types: Examine the provided amine structures.
   • Evaluate each structure to ascertain whether the nitrogen atom is bonded to one, two, or three carbon-containing moieties.
3. Ascertain NaOH Solubility: Concentrate on primary amines.
   • Structure 1 (aniline derivative) - Classified as a primary amine.
   • Structure 2 (benzylamine group) - Classified as a primary amine.
   • Structure 5 (aliphatic primary amine) - Classified as a primary amine.
   • Structure 8 (another aniline derivative) - Classified as a primary amine.
   • Structure 9 (cyclohexylamine) - Classified as a primary amine.
4. Quantify Primary Amines: The aggregate count of primary amines is 5.
5. Substantiate Outcome: Verify that the computed quantity falls within the stipulated range of 5,5.

The computed value of 5 aligns with the specified range.

Consequently, there are 5 primary amine compounds that form solids soluble in NaOH when treated with Hinsberg's reagent.